Without waiting for Lao Li to ask for help, Chen Chu asked the spit system for help as soon as possible, and used up this wishing opportunity.

Despite this, the matter of the brush will have to be stranded in a short period of time, but human life is greater than the sky, not to mention the little lychee that I like, and I can't manage it so much.

"Lao Li, why don't you go out without medicine when your child is sick, and you don't say it in advance?"

Chen Chu launched the spit skill for the first time, which was also what really made him criticize, and this parent was too careless.

"She's been stabilized before, how would I know she's having a seizure here?"

Li Er was also very distressed, and he took an imperial doctor with him for a good trip...... It seems to have been said in the past, but didn't I forget the beauty of traveling because of my patronage.

"Ding, the system has detected your complaining behavior, the spit value is +200, and a box of oxygen shields will be rewarded, and the location will be tented."

Whew, the system really doesn't talk to me!

Chen Chu returned to his tent and saw a small alley behind his sleeping bag, about the size of a schoolbag, and after opening it, it was densely packed with several bundles of oxygen shields, a total of six.

The oxygen bag has a capacity of 42 liters, which is small but can provide breathing for a long time.

He took one of them, and while reading the manual, he walked quickly towards Li Lizhen.

Seeing Chen Chu return to the tent and take out something, Li Er and the others breathed a sigh of relief, and Fang Xuanling and the others were also relieved, it seemed that he had a way to deal with it.

Li Lizhi was named the princess of Changle, she was favored for the rest of her life, and there was no one among all the children, if she encountered an accident here today, the ministers could still imagine what kind of blow he would suffer.

Chen Chu buckled the oxygen mask on Li Lizhi's face, clamped the bridge of her small nose with a nose clip, fixed the bandage on the back of her head, and then turned on the switch of the oxygen bag.

The immediate effect appeared, Li Liqin, who couldn't breathe hard, took a few big breaths, and after a few big breaths, her breathing finally calmed down, and the paleness on her face began to gradually recede.

Everyone looked at Chen Chu's operation in awe, and they felt incredible.

If it is a doctor in Datang, no matter how famous she is, no matter how skilled she is, I am afraid that she will have to toss for a long time, and whether she can be rescued depends on the number of days.

"My beauty has finally been saved!" Li Er was overjoyed, hugged Li Lizhi and kissed her on the face twice, and then handed it to the eldest grandson queen, and began to observe this strange thing curiously.

Chen Chu also glanced at the price in the exchange mall at this time, the oxygen mask is not cheap, 50 spit is worth one, and the oxygen bag is worth 20 spit is worth a pack.

However, when you exchange for an oxygen mask, you will come with a pack of oxygen bags, which means that the simple mask has a 30 spit value, so it's okay.

Everyone was so frightened that their sleepiness was almost gone, and at this time they curiously asked what this thing was, what its principle was, and how they saved Princess Changle just now.

"Have you ever climbed a mountain, not a very low mountain, but a high mountain."

Chen Chu asked, and Li Er asked suspiciously: "Are Huashan and Huangshan considered high mountains?" ”

Chen Chu shook his head: "It's not the kind of high mountains on the flat land, but the high mountains that grow on the mountainous terrain of the plateau. ”

Li Xiaogong raised his hand and said, "I have this experience." ”

"Do you feel that you have difficulty breathing, and your chest can't breathe?" Chen Chu asked.

Li Xiaogong nodded again and again, and Li Er suddenly said: "Huangshan Huashan and others also feel from this, is this the reason why Lizhi can't breathe?" ”

"She can't breathe either, but it's different from yours, she's a problem with the body's mechanism, didn't you say that there is such a situation in your family era, so in the future, let her eat more meat, take more nutrients, and exercise more, but not too drastic, you just protected her too well before, and didn't let her eat or move, so her body foundation was very poor."

Chen Chu said that Empress Changsun nodded hurriedly, eager not to forget a word, and she would take a note when she went back to the tent in a while.

"You can't breathe in the mountains because the air in the sky becomes thinner as you get higher, because everything has weight, and the air has weight, albeit very little, and the main body sinks to the ground near the ground."

Chen Chu explained, of course, this sounds nonsense, but Chen Chuxiang is good for them to understand, and it is good to understand why the air at high altitude is thinner, and everything else is not important.

"I see...... So is that bag full of air? Li Er looked at the dark blue oxygen bag.

"This is purified air, which extracts the things in the air that people need most, so that people can't breathe, and they can be poured into the mouth to replenish the air they need in the body."

Chen Chu explained vaguely: "If it is on a plateau or a very high peak, this thing can also come in handy, and it will not feel painful after wearing it, and it is not good for breathing." ”

"For example, the Qinghai-Tibet Plateau, which is now the territory of Tibet, as long as our soldiers wear this thing, they can move freely in the grassland like the Tibetans, and they will no longer feel uncomfortable."

Li Er's pupils shrank, Tubo!

But isn't it, the Tibetan people beat them, come and go like the wind, and run away when they hit, because they are high ground.

But the Tang Dynasty had nothing to do with them, not to mention that the country could not vacate now, even if there were enough troops to fight back, the soldiers would not be able to climb the plateau, and they would feel uncomfortable, and the generals could only order a retreat.

This is the reason why Datang currently has to deploy heavy troops at the junction with Tubo, and there is really no way to take it.

But if there is such a thing, the soldiers can fight with the Tubo people normally, and they are afraid of a small country with a small population?

Li Xiaogong asked urgently: "Lord Chen, this thing is difficult to make...... Forget it, you don't have to ask to know that this thing is not trivial, and it is estimated that it will not be able to equip troops in large quantities. ”

Chen Chu nodded, this thing is really expensive, it's not 10 spit worth 1 unlimited get, at least a mask with several packs of oxygen bags, that is, hundreds of spit value starts.

He keeps saving all day long, and I'm afraid he won't be able to exchange much.

This is to arm an army, it's scary to think about it, this is a rhythm that can't be squeezed out of it.

"Don't be disappointed, things can be stored slowly, and if there is enough time, I think it is still possible to arm a cavalry of tens of thousands of people."

Chen Chu comforted everyone: "When the time comes, we will deceive the Tibetan barbarians to the flat ground, as long as we can hit them hard at one time, we can kill the plateau and never suffer in the future!" ”

The words "Forever in the future" made Li Er and the others tremble in their hearts.

To be honest, he had never had the intention of conquering Tibet, after all, the environment in that place was too bad, and it was not a place for the Central Plains soldiers to adapt to at all.